{
  "id": "2502.01738",
  "version": "v1",
  "published": "2025-02-03T19:00:02.000Z",
  "updated": "2025-02-03T19:00:02.000Z",
  "title": "Can the neutrinos from TXS 0506+056 have a coronal origin?",
  "authors": [
    "Damiano F. G. Fiorillo",
    "Federico Testagrossa",
    "Maria Petropoulou",
    "Walter Winter"
  ],
  "comment": "7 pages, 2 figures, plus appendices",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "The blazar TXS 0506+056 has been the first astrophysical source associated with high-energy astrophysical neutrinos, and it has emerged as the second-most-prominent hotspot in the neutrino sky over ten years of observations. Although neutrino production in blazars has traditionally been attributed to processes in the powerful relativistic jet, the observation of a significant neutrino flux from NGC 1068 -- presumably coming from the Active Galactic Nucleus (AGN) corona -- suggests that neutrinos can also be produced in the cores of AGN. This raises the question whether neutrino production in TXS~0506+056 is also associated with the core region. We study this scenario, focusing on the hypothesis that this blazar is a masquerading BL Lac, a high-excitation quasar with hidden broad emission lines and a standard accretion disk. We show that magnetic reconnection is an acceleration process necessary to reach tens of PeV proton energies, and we use observationally motivated estimates of the X-ray luminosity of the coronal region to predict the emission of secondaries and compare them to the observed multi-wavelength and neutrino spectra of the source. We find that the coronal neutrino emission from TXS 0506+056 is too low to describe the IceCube observed neutrinos from this AGN, which in turn suggests that the blazar jet remains the preferred location for neutrino production.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2025-02-03T19:00:02.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "coronal origin",
      "neutrino production",
      "hidden broad emission lines",
      "acceleration process necessary",
      "coronal neutrino emission"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}